And albert cunningham



2Sheets-Sheet 1. E. J. MULLER 81; A. CUNNINGHAM.

(No Model.)

HEAD BLOCK FOR SAWMILL GARRIAGBS.

. Patented Dec. 24, 1895.

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. 2 Sheets-Sheet 2.. E. J. MULLER 8a A. CUNNINGHAM I HEAD BLOCK FORSAWMILL UARRIAGES.

(No Model.)

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PATENT ERNST J. MULLER, OF FORT WAYNE, INDIANA, AND ALBERT CUNNINGHAM,OF MILTVAUKEE, XVISCONSIN; SAID CUNNINGHAM ASSIGNOR TO SAID MULLER.

HEAD-BLOCK FOR SAWMILL-CARRIAGES.

SPECIFICATION forming part of Letters Patent No. 551,871, dated December24, 1895.

Application filed. June 9, 1892. Serial No. 436,051. (No model.)

To all whom it may concern:

Be it known that we, ERNST J. MULLER, of

Fort Wayne, in the county of Allen and State of Indiana, and ALBERTCUNNINGHAM, of Mil- 5 waukee, in the county of Milwaukee and State ofWVisconsin, have invented'eertain new and useful Improvements inHead-Blocks for Sawmill- Carriages; and we do hereby declare that thefollowingis a full, clear, and exact description of the invention, whichwill enable others skilled in the art to which it pertains to make anduse the same,referenee being had to the accompanying drawings, and tothe letters of reference marked thereon, which form a part I 5 of thisspecification.

The main objects of our invention are to relieve the operatingconnections of the knees from the shock and strain of heavy logs ortimber thrown or moved forcibly against them, to facilitate placing theset-shaft bearings and pinions and to prevent the binding of theset-shaft in its bearings, to provide for the exact alignment of theknees with each other and to facilitate their adjustment to lines moreor less oblique to the saw-line for the purpose of sawing taper stuff.

It consists of certain novel features in the construction andarrangement of the taper mechanism and of the set-shaft bearingshereinafter particularly described, and pointed out in the claims.

In the accompanying drawings like letters designate the same parts inthe several figures.

' Figure 1 is a vertical longitudinal section of a head-block and itsattachments, to which our improvements are applied. Fig. 2 is a similarview of a portion of a head-block and knee, showing modifications of thetapermovement and set-shaft bearing illustrated in Fig. 1. Figs. 3 and 4are detail views, on an enlarged scale, of a portion of the taper leverand its connections, Fig. 3 being a side elevation, and Fig. 4alongitudinal section in a plane at right angles to the plane of movementof said lever. Fig. 5 is a horizontal sectional view, on an enlargedscale, of the set shaft bearing and its connections shown in Fig. 1; andFig. 6 is a plan view of a portion of a head-block and horizontalsection of a portion of the associated knee, showing the stop forlimiting the advance of the knee.

Referring to Fig. 1, A is a head-block and G a knee having the usualtongue-and-groove connections therewith at its base, whereby it isadapted to be movedhorizontally toward and from the saw-line indicatedat N, which represents a portion of the saw. The knee is provided in itsbase with a sliding rack D, having tongue-and-groove connec- 6o tionstherewith, asclearly shown in Fig. 4.

E is the set-shaft, having keyed thereon a pinion e, which engages withthe rack D.

F G represents the taper-lever pivotally and yieldingly connected withthe base of the knee 0 by an eyebolt H, which is supported horizontallyand movable endwise in a notched lug or ear h on the base of the knee.Between said ear 7L and a nut and washer 71/ a spring 77, is placed uponsaid eyebolt, so as to permit the knee to yield against the tension ofthe spring to a blow or excessive strain upon the working face of theknee which would be liable to break or injure its connections. At itslower end said 75 lever is connected by a link I with rack D. The end ofthe link connected with said rack is formed witha split collar, which isclamped by a bolt j upon an eccentric J, through which the pivot-pin jpasses. This eccentric is formed with a notched flange j ,'or providedwith other suitable means for turning" it in the link when the nut onthe/clampingbolt j is loosened. By this means the knee may be movedlongitudinally upon its rack D so as to bring it into exact alignmentwith the other knee or knees of the carriage.

The taper-lever consists of two parts, the arm or handle F and the stubG. The Still) G is bored axially to receive a cylindrical 9o latch K,which projects at its outer end to engage with notches formed, in theinner edge" of the quadrant L, attached at the ends 'to the base of theknee. Aspiral spring k, inserted in an annular recess provided for itaround 5 latch K within the leverstub,'forces and holds said latchnormally outward in engage 'ment with the quadrant L. The taper-1everand latch are constructed and arranged so that the initial movement ofthe handle F in either direction will operate first to disengage thelatch from the quadrant, and then to shift the knee in either direction,as desired, the handle automatically assuming its central or normalposition with reference to the stub when released and the latch engagingwith the quadrant. For this purpose the handle F is provided, adjacentto the outer end of the le ver-stub G, with a trip or cam plate f, whichis formed on each side of the longitudinal center of the lever andequidistant therefrom, with arc-shaped slots f f, in which are insertedand loosely held pins g g, projecting from the'lever-stub G. The loweredge of the trip-plate f is curved upwardly between the slots f, asclearly shown in Fig. 3, and is arranged to engage with the endof across-bar secured in latch K and loosely projecting through a slot inthe lever-stub, which incloses and constitutes a housing for said latch.At its lower end the handle F is held in a keeper g, formed with orattached to the lever-stub G, and constructed and arranged to permit thehandle F to be turned upon either of the pinsgto the extent of theopposite slot f, and at the same time to hold it firmly in its properrelation to the lever-stub. The lower edge of the trip-plate f is soshaped that when the handle F is turned upon either of the pins 9, as apivot, it will by its initial movement act upon the projecting cross-bar7a to force the latch K out of engagement with the quadrant L. When thelever is released, the spring 70 will force the latch outwardly intoengagement with the quadrant and bring the handle F to its normal orcentral position with reference to the lever-stub.

The operation of the handle F upon the latch is illustrated by dottedlines in Fig. 3, and the operation of the taper-lever in advancing theknee is shown by dotted lines in Fig. 1. The dotted position at theright in Fig. 1 shows the limit of the receding movement of the knee.

Referring to Fig. 2,which illustrates a modification of the taper-leverand its connections, the handle F is pivoted to the eyebolt H, by whichit is yieldingly connected with the base of the knee in the mannerhereinbefore explained, and is provided with a keeper P, which passes onthe opposite side of the quadrant L, thereby steadyin g and supportingsaid lever-handle in its proper relative position to said quadrant. M isthe lever-stub pivoted concentrically with the handle F to the eyeboltH, and connected at its lower end by a link 1 with an eyebolt O, whichis adjustably fastened in a perforated lug d on rack D by nuts 0 0. Tothe upper end of the lever-stub M is pivoted one end of a latch m, theopposite end of which has a yielding connection therewith through aneyebolt m pivoted to said latch and passing loosely through a perforatedblock m swiveled in said lever- ,stub. Upon this eyebolt between ashoulder thereon and said block m is placed a spring m which forces thelatch outwardly and holds it normally in engagement with the innernotched edge of quadrant L. A friction-roller n journaled on a pinsecured in handle F and the keeper f passes through an opening in thelatch and bears against the inner curved or cam-shaped side of saidopening, which is so constructed and arranged that when the handle F isturned in either direction its initial movement will carry thefriction-roller n out of the depression in which it normally rests insaid latch, and thereby force said latch against the tension of spring mout of engagement with the quadrant.

In both the constructions shown in Figs. 1 and 2 the ends of thepivot-pin in the eyebolt H project into and are guided by horizontalslots 0 in ears 0 011 the base of the knee, as indicated by dottedlines. The ends of the pivot-pin in eyebolt 0 (shown in Fig. 2) alsoproject into and are guided by slots d in ears d formed on rack D, asindicated by dotted lines.

To facilitate placing and securing the pinions upon the set-shaft, andto prevent the binding of the set-shaft in its bearings in case thehead-blocks are not accurately aligned or in case they get out ofalignment, we provide a box P in the head-block for the set-shaft, witha pivotal connection with the head-block which allows said box toconform in position to said shaft without binding thereon. To furtherprovide against injury to the set-works and connections by which theknee is operated and adjusted from a heavy strain or violent blow uponthe working face of the knee, we also provide the box P with a yieldingconnection with the head-block. For this purpose the box is pivoted by avertical pin 19, passing through ears thereon to an eyebolt Q,

supported horizontally and movable length-.

wise in bearings provided therefor in the headblock, as shown in Figs. 1and 5. A spring q, bearing in opposite directions against the head-blockand the nut and washer on said eyebolt, permits the set-shaft to yieldaway from the saw-line.

For the sake of firmness and stability we prefer to provide the box P onits under side with a bearing-support in the opening formed therefor inthe head-block, as shown in Fig.

1. This construction and arrangement of the" set-shaft boxes not onlyprevents the set-shaft from binding, but also greatly facilitatesassembling the set-shaft and its connectionsin the carriage, the pinionsbeing placed and. keyed thereon in the head-blocks before the boxes aresecured in place, and the openings in the sides of the head-blocksprovided for said boxes affording ample room for placing and keying saidpinions on the set-shaft.

In 2, illustrating a modification of the'- set-shaft bearings, the box Pis pivoted directly to the head-block, and the pivot-pin p is made toproject above the top of the headblock so as to serve as a stop for theknee,

' engage the upper projecting end of pin 1) and limit the advancemovement of the knee at the desired point.

In Fig. 6 a bolt or stud a, (indicated by dotted lines in Fig. 1,)secured in the top of the head-block, is shown to serve the purpose ofthe pivot-pin p in Fig. 2.

It is obvious that various modifications in the details of constructionand arrangement of the parts hereinbefore described may be made withinthe intended scope of our invention.

We claim 1. In a saw mill carriage, the combination with a head blockand a knee provided with a longitudinally adjustable rack, of a leverhaving a fulcrum connection with said rack and a horizontally yieldingpivot connection with the knee, substantially as and for the purposesset forth. 7

2. In a saw mill carriage, the combination with a head block and a kneeprovided with a longitudinally adjustable rack, of a lever pivoted to abolt or rod movable horizontally in the knee, a spring acting inopposite directions against said knee and said bolt or rod, and afulcrum connection between said lever and rack, substantially as and forthe pur-.

a notched quadrant and with a rack longi-- tudinally adjustable in itsbase, of a lever pivoted to said knee and provided with a spring latchadapted to en gage with said quadrant and a link connecting said leverwith said rack and provided in one end with an adjustable eccentricpivot connect-ion, whereby said knee may be aligned horizontally withthe other knee or knees of the carriage, substantially as and for thepurposes set forth. at. In a saw mill carriage, the combination with ahead block and a'knee provided with a notched quadrant and with a racklongitudinally adjustable in its base, of a lever pivoted to said kneeand provided with a spring latch adapted to engage with said quadrantand to hold said lever in any desired position, a link connecting thelever with said rack and formed at one end with a split collar which isprovided with a clamping bolt, andan eccentric through which the pivotpin passes, inserted and held in said collar, substantially as and forthe purposes set forth.

5. In a saw mill carriage, the combination with a head block and a kneeprovided with a notched quadrant and with a longitudinally adjustablerack, a lever pivoted to said knee and provided with a spring latchadapted to engage with said quadrant and to hold said lever in anydesired position, a link connecting said lever with said rack and formedat one end with a split collar which is provided with a clamping bolt,and an eccentric through which the pivot pin passes inserted and held insaid collar and provided with a notched flange for turning it therein,substantially as and for the purposes set forth.

6. In a saw mill carriage, the combination with a head block and a kneeprovided with a longitudinally adjustable rack, of a lever having ayielding pivot connection with said knee and an adjustable linkconnection with said rack, substantially as and for the purposes setforth.

7. In a saw mill carriage, the combination with a head block providedwith a notched quadrant and an adjustable rack, of a taper lever havingpivot and fulcrum connections with said knee and rack and comprising anarm orstub formed with a longitudinal socket, a latch inserted in saidsocket and having a reduced cylindrical portion, and a spiral springcoiled around the reduced portion of said latch and bearing at one endagainst a shoulder thereon and at the other end against said arm or stubwhich incloses it, substantially as and for the purposes set forth.

8. In a saw mill carriage, the combination with a head block and kneeprovided with a quadrant and an adjustable rack, of a taper lever havingpivot and fulcrum connections with said knee and rack and comprisingastub provided with a spring actuated latch adapted to engage with saidquadrant and a handle provided With a trip plate formed on oppositesides of its longitudinal center with two arcshaped slots through whichpins on the lever stub are inserted and held and having its lower edgecurved or cam-shaped to engage with a projection from saidlatch,substantially as and for the purposes set forth.

9. In a saw mill carriage, the combination with a head block providedwith a knee having an adjustable rack and a quadrant of a taper leverhaving pivot and fulcrum connections with said knee and rack andconsisting of a lever stub provided with a spring actuated latch movablelongitudinally therein and operating outwardly and with two pivot pinson opposite sides of its longitudinal center and of a handle providedwith arc-shaped slots in which said pins are loosely held and with atrip or cam plate adapted to engage a projection .from said latch,substantially as and for the purposes set forth.

10. In a saw mill carriage, the combination with a head block providedwith a knee having an adjustable I rack and a quadrant notched on itsinner edge, of a taper lever having pivot and fulcrum connections withsaid knee and rack and consisting of a stub provided with an outwardlyworking spring actuated latch adapted to engage with the inner edge ofsaid quadrant, said stub being also provided on opposite sides of itslongitudinal center with two pivot pins, and of a handle provided witharc-shaped slots in which said pins are loosely held and with a trip orcam adapted to engage with a projec- IIO tion from said latch, saidlever stub being of the lever handle in place relatively there-' to,substantially as and for the purposes set forth.

11. In a saw mill carriage, the combination with a head block providedwith a knee having a rack longitudinally adjustable in its base and aquadrant notched in its inner edge, of a taper lever consisting of astub having a yielding pivot connection with said knee, an outwardlyoperating spring actuated latch, pivot pins on opposite sides of itslongitudinal center, and a keeper below said pivot pins, and of a handleformed witharcshaped slots in which said pivot pins are loosely held andwith a trip or cam arranged to engage a projection from said latch, thelower end of said handle being held by said keeper in place relativelyto said stub, and an adjustable link connection between the lever stuband said rack, substantially as and for the purposes set forth.

12. In a sawmill carriage, the combination with a head block and knee,provided with a rack, of the set shaft provided with a pinion workingwith said rack, and a box for said shaft pivotally connected with saidhead block, substantially as and for the purposes set forth.

13. In a saw mill carriage, the combination with a head block and kneeprovided with a rack, of the set shaft provided with a pinion workingwith said rack, and a box for said shaft yieldingly connected with saidhead block, substantially as and for the purposes set forth.

14. Ina saw mill carriage, the combination with a head block and kneeprovided with a rack, of the set shaft provided-with a pinion workingwith said rack, and a box for said shaft pivotally and yieldinglyconnected with said head block, substantially as and for the purposesset forth.

15. In a saw mill carriage, the combination with a head block and kneeprovided with a rack, of the set shaft provided with a pinion workingwith said rack, an eye-bolt sup ported horizontally and movable endwisein the head block, a spring having a bearing at the ends on said boltand on the head block, and a box for the set shaft, pivotally connectedwith said eye-bolt, substantially as and for the purposes set forth.

In testimony that we claim the foregoing as our own we affix oursignatures in presence of two witnesses.

- ERNST J. MULLER.

ALBERT CUNNINGHAM.

Vitnesses: Y

CHAS. L. Goss, E. G. AsMUs.

